%0 Journal Article %A V. P. Platonov %A G. V. Fedorov %T On the classification problem for polynomials $f$ with a periodic continued fraction expansion of $\sqrt{f}$ in hyperelliptic fields %J Izvestiya. Mathematics %D 2021 %P 972-1007 %V 85 %N 5 %U http://geodesic.mathdoc.fr/item/IM2_2021_85_5_a6/ %G en %F IM2_2021_85_5_a6